Combined bushing and coupling for electric installation.



W. H. VIBBER.

COMBINED BUSHING AND COUPLING FOR ELEGTRIG INSTALLATION.

APPLICATION IILED M11130, 1908.

2,638, Patented Sept. 29, 1908.

To all whom it may concern." 7

NITED STATES PATENT oEEIcE.

WHEELER H. VIBBER, OF NEW LONDON, CONNECTICUT, ASSIGNOR TO THE GILLETTE-VIBBER 00., OF NEW LONDON, CONNECTICUT, A CORPORATION.

, COMBINED BUSHING AND COUPLING FOR ELECTRIC II INIS'JEALLA;'IION.

Be it known that I, WHEELER H. VIBBER,

,a citizen of the United States, residing at New London, in the county of New London and State of Connecticut, have invented a new and useful Im rovement in a Combined Bushing and Coup g'for Electric Installation; andI dohereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said cordance wit my invention.

drawings constitute part of this specification, and represent, in

Figurel a view in side elevation of a com-" bined bushin and conduit constructed in ac- Fig. 2 a view thereof in section with the nut and binding ring removed. Fig. 3 a view in transverse section on the line a,b of Fig. 1. 7

My invention relates to 'an improved combined outlet bushing and coupling for use in electric installation, the object being to provide for the purpose described, a simple, convenient, compact and effective part constructed with particular reference to avoiding bending the armor of'armored cable, and flexible steel conduit.

Withthese ends in view my invention consists in the construction and combination of parts to be hereinafter described .and pointed out in theclaims.

In carryin out my invention as herein shown, I emp 0y an elbow-shaped combined bushing and conduit 2 formed atwhat I may call its bushing-end 3, with an annular beador shoulder 4, and with (external threads 5 'for the reception of a binding nut 6. It will 1 1 bear upon thelouter face thereof. a

be understood that this bushing-end is inand screwed up 'against'the inner face 0 the boxor cabinet until the" bead 4 is brought to duit-end 7 of my improved part is formed -welljwithin its end with'an annular'stop- "I 'shoulder'S which forms a contracted o ening i 9 for the wires which are thus centere so to speak,- in the part. The conduit-end 7 of the part is also formed with a transverse slot 10 Specification of Letters Patent.

Application filed. January 30, 1908. Serial No. 418,367.

slot 10.,

i specification in the Patented saga. 29, 1908.

for the'reception of a binding ring 11 carrying a screw 12 the inner end of which enters a notch 13 formed'in the outside of the conduit-end 7 at a point oppositethe transverse When an armored cable or a'flexible conduit is inserted into the conduit-end 7, it will be stopped in its inward movement therein by the shoulder 8 which may be said to position the cable or conduit, after which the screw 12 is operated to draw the ring 11 into the slot 10 whereby the ring in this eccentric movement iscaused to grip the cable or conduit and hold the same very firmly in place. I

On account of the elbow-like form of the part, whereby its bushing-end 3 and conduit-end 7 stand at substantially a right angle to each other, it becomes unnecessary to bend the end of armored cable or flexible conduit be: inginstalled, it being extremely desirable to avoid such bending, not only on account of the difliculty of it, but because'in. making such-a bend in a flexible conduit the same is liable to be so distorted asto prevent a wire from being drawn through it. It is not necessary that the bushing and conduit ends 3 and 7 shouldstand at a right angle to each other as herein shown, as they may be made to stand at any angle to each other required by the'circumstances of use.

I claim Asa new article of manufacture, a combined bushing and conduit for use in electric installation,- consisting in the combination with an elbowhavin a bushing-end formed with an externals oulder and ex'temal threads and provided with a nut and thus adapted to be applied to an outlet box or cabinet, and having its conduit-end formed with a transverse slot, of a clamping; ring 'agapt'ed to'be applied. over the conduif't'e'end testimony whereof, have signed this presence of two subscribe said elbow and entering the said slot I .jandfurnished with a clam ingscrew. 

